July weather forecast
Petaling Jaya, Malaysia

In July, Petaling Jaya experiences an elevation in wind speed that reaches 5.2km/h (3.2mph), offering some respite in the humidity-laden air. While there's plenty of rain to keep the heavy heat under control, daytime remains partly sunny. With skies less overcast compared to previous months, the city feels warmer. The slight breeze along with rainfall creates a tranquil atmosphere across the city. In the upcoming month of August, weather conditions remain roughly the same, with minor tweaks in temperature and rainfall.

Temperature

July's onset records a minor alteration in the average high-temperature to a still tropical 32.3°C (90.1°F) from June's 32.4°C (90.3°F). Throughout July, Petaling Jaya encounters an average temperature drop to a moderately hot 23.8°C (74.8°F).

Heat index

July's average heat index is estimated at a blistering 43°C (109.4°F). On guard: Heat exhaustion and heat cramps are predicted. Heatstroke is a potential hazard with continuous physical effort.
The standards for the heat index are set for locations in shade and under light breezes. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. One should be aware that direct sunshine can amplify the perceived temperature, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Children typically face more danger than adults as their sweat production is usually lower. Additionally, the bigger skin surface compared to their small size and the increased heat due to their activeness exacerbate the risk.
When temperatures rise, the human body turns to perspiration, using the cooling power of evaporating sweat. When there is abundant moisture in the air, the body's cooling through the evaporation process becomes less effective, leading to the sensation of overheating. When body temperature rises due to an imbalance in heat gain, there's a potential for dehydration and overheating.

Humidity

In July, the average relative humidity is 74%.

Rainfall

In Petaling Jaya, in July, it is raining for 26.6 days, with typically 103mm (4.06") of accumulated precipitation. In Petaling Jaya, during the entire year, the rain falls for 309.8 days and collects up to 1481mm (58.31") of precipitation.

Daylight

In Petaling Jaya, the average length of the day in July is 12h and 17min.
On the first day of July, sunrise is at 7:08 am and sunset at 7:26 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 7:27 pm +08.

Sunshine

In Petaling Jaya, the average sunshine in July is 8.7h.

UV index

February through October and December, with an average maximum UV index of 7, are months with the highest UV index in Petaling Jaya. A UV Index of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In July, the maximum UV index of 7 suggests this advice:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.